I was required to mix it and let it sit for hours. The mixture was like clumpy mud; imagine trying to get clumpy mud throughout your hair. I was already worrying about my head of hair getting stressed out with the dying process. Trying to get that mixture on each row of strands was pretty ridiculous. I know it can be done, but not by me for sure. And rinsing out the mud into my drain didn't sit too well with me. I won't be purchasing this again. One star for changing the color of my hair, but it did not change the color of my few gray hairs.